Key actuated locking bolt



l NO V. 2, 1937. H` H, KISTNER- 2,098,189

KEY ACTUATED LOCKING BOLT Filed Sept. 18, 1935 Z6 Z-Ml? gmc/whoa',

Patented Nov. 2, 1937 UNITED sTATEs PAT-ENT OFFICE KEY ACTUATED' LOCKING 'BOLT Application September 18, 1935, Serial.No.,41,1-15

10 Claims. (Cl. 70-90) This invention relates to sliding `boltsfof the push-pull type commonly used for securing swinging and sliding doors, closets, drawers, windows and o-therclosures, and aims to provide for locking the same in both retracted and projected positions.

The invention further aims to improve bolt locksof the multiple tumbler type .for all purposes for which a key actuated lock is desirable,

and particularly to safeguard such .locks from being jimmied or forced by any means readily available to unauthorized persons.

The invention enables a strong Yand secure bolt lock to be produced at low cost, applicable to many purposes for which heretofore no adequate key actuated lock has been available.

Other objects and advantages yof the invention appear in connection with the following description of two preferred forms kor embodiments of 20, the invention, illustrated in the accompanying drawing, wherein Fig. l is a part sectional and part side view of a locking boltillustrated as secured to the side of a door, window or other closure which swings a or slides in a frame, the bolt being shown in locking position;

Fig. l2 is a longitudinal cross-section thereof on the line 2-2 in Fig. l, looking in the direction of the arrows;

Fig. 3 is a cross section thereof on the line v3--3 in Fig. 1, showing the butt end of the bolt and key slot therein in elevation;

Fig. 4 is a transverse cross-section on the line 4 4 in Fig, l, looking in the direction of the arrows;

Fig. 5 is a disassembled perspective View of the plunger, and shell; and

Fig. 6 is a vertical cross-section through a double hung window sash showing a mortisetype bolt lock embodying the invention.

In `the form of the invention illustrated in Figs. 1 to v5 inclusive, the body or housing II is :provided with a stud I2 to seat in a corresponding hole drilled in the face of the door style, meeting rail, or other movable part that is .to carry it,

and base flanges I3 whereby it may be secured,

against. the face of the door or thelike by 'screws if desired. The body is drilled lengthwise to receive the lock shell I4, which may be `secured thereinby means of ia set screw I5. Such a lhousing bodyl may be'readily secured to rany outwardlyr opening closure member that rit is desired to lock by means of a `sliding b olt mounted on its exterior,'and when the closure is locked into its frame,

thehousixlg -body .cannot bememoved without .un-

locking it. No claim is made herein to the combination of housing body and stud with the sliding bolt, this feature of the invention being the subject-matter of my application Ser. No. 41,116, filed vSeptember 1-8, 1935.

The lock shell is hollow to receive the sliding bolt I6 and is slotted lengthwise and circumferentially as shown in Fig. 5 to receive the guiding and locking pin I1 which is driven into the bolt near its butt end. At the forward end of the housingis an inturned flange I8 which closes the end of the bore except for the hole through which the forward end of the .bolt protrudes in projected or locking position. In the form shown in Fig. 6 this flange is on the end of the shell. The shell is provided with spaced openings I9, 20 for receiving the ends of the locking pins or discs 2I, for locking the bolt in locking and .retracted positions respectively.

These locking members 2| are mounted in cross slots 22 in the bolt ,body and are normally held in their outward positions with their ends projecting into one or the other of the openings I9, 2D, by small coil springs 23 disposed in staggered holes drilled in the bolt body at rthe ends of the cross slots 22. These locking members or tumblers have openings through which the key 24 passes when inserted in the axial slot 25 in the butt end of the bolt, the dimensions of these openings cooperating with the nibs on the key for alining all theplockingmernbers with their ends flush with the bolt body when the key is inserted to permit manipulation of the bolt. Thus when the key is inserted in the bolt to its proper seat, the bolt can be moved endwise and rotated thereby, its movements being guided by the pin I1 working in the slot in the shell.

A coil spring 26 is arranged in the space between the flange I8 and a shoulder on the bolt adjacent its body to retract it when unlocked by the key and rotated so .that the guide pin I'I is in alinement with the longitudinal portion 21 of f the slot in the shell. A notch 28 is provided at the end of the transverse portion of the slot in the shell into which the spring 26 forces the pin I1 in the protruded or locking position of the bolt. Unless the mating key is in its proper place in the slot provided for it in the butt end of the bolt, the ends of the pins or discs 2I engage in one or the other of the opposite openings of the pairs I9, 20 in the shell to prevent the bolt from turning, thereby' safeguarding the bolt against movement should an. attempt be made to turn it by a false key, screw driver or like implement inserted in the key slotcure it in place in the sash. The operation of the lock is the same as that shown in Figs. 1 to 5.V

No claim is made herein to thev split bushing and mounting for the bolt lock, this feature of the invention being the subject-matter of my application Serial No. 127,225, filed vFebruary 23, 1937.

The housing, shell and body portion of the bolt may be made accurately and cheaply by die-casting methods, and the key and pin discs are readily stamped from sheet metal, therebyenabling the lock to be produced at minimum cost.

Modification of the shape and arrangement of the parts and changes in the dimensions to suit different types of lock and places of use may be made without departing from my invention which is not restricted to the illustrative embodiments herein described.

I claim the following as my invention:

1. A bolt lock having a housing, a cylindrical bolt mounted therein vfor sliding and rotating movement, one end of said bolt beingadaptedV for projection into a cooperating socket member in its locking position and the 'other end being grooved to receive a key,'an abutment on said bolt spaced from its locking end, spring means.

surrounding said bolt between said abutment and a fixed part of said housing for retracting said bolt from locking position, a transverse abutment in'said housing intermediate the ends of said bolt, said transverse abutment being spaced between said bolt abutment and grooved end vof said' bolt in unlocked position thereof, means on said bolt for engaging said transverse abutment in locking position to retain it against pressure of said spring, Vrotation of said bolt serving to disengage said means from said transverse abutment to permit retraction of the bolt, and key actuated means carried by said bolt to lock it against rotation in its locking position.

2. A bolt lock having a housing, a cylindrical in said housing intermediate the ends of saidA bolt, said transverse abutment being spaced between said` bolt abutment and grooved end of said bolt in ,unlocked position thereof, means on said bolt for engaging Vsaid transverse abutment in l locking position to retain it 'against pressure of said spring, rotation of said boltserving to disengage said means from said transverse abutment to permit retraction of the bolt, a recess in said housing adjacent said .key-receiving slot in said bolt, a transverse openingY in said bolt intersecting said key-receiving slot and adaptedrto register with said housing recess in locking position, and key-actuated means'carried by'said bolt to engage said recess in locking position of said bolt and lock it against rotation.

3. A bolt lock having a cylindrical housing adapted for insertion in a corresponding recess in a frame member and having an internal flange at one end and an opening to receive the bolt at the other end, a cylindrical bolt mounted therein for rotating and sliding movement, one end of said bolt projecting lfrom the anged end of said housing in locking 'position and the other being ,substantially ush with the open end of the housing in retracted position, the latter end of the bolt being slotted to receive a key, an abutment on said bolt spaced from its locking end, a coil spring surrounding said bolt between said abutment and the flangeat the end'of said housing, a transverse pin in said'bolt near its slotted end, a groove in the Wall of said housing remote from said spring,

said groove being shaped to receive said pin and extending longitudinally and circumferentially to permit lengthwise and turning movement of said bolt and terminating in a seat for retaining the bolt in locking position against the pressure ot said spring, said seat being spaced lengthwise of Said housing to avoid overlapping said spring in any position of said bolt, and radially projecting means carried by said bolt for engaging said housing to prevent'movement of the bolt, said means being retractable by the insertion of the proper key in said key slot to permit movement of said bolt by said key to unseat said pin from its seat.

4. A bolt lock having a cylindrical housing adapted for insertion in a corresponding recess in a frame member and having an internal flange at one end, a cylindrical bolt mounted therein for rotating and sliding movement, one end of said bolt projecting from the flanged end of said housing'in locking position and the other being substantially flush with the corresponding end of the housing in retracted position, the latter end of the bolt being slotted to receive a key, an abutment on said bolt spaced from its locking end, a coil' spring surrounding said bolt between said abutment and the iiange at the end of said housing, a transverse pin in said bolt near its slotted end, a groove in said housing to receive said pin, said groove extending longitudinally and circumferentially to permit lengthwise and turning movement of said bolt and terminating in a seat for retaining the bolt in locking position' against the pressure of said spring, longitudinally and circumferentially spaced recesses in said housing, and radially projecting means carried by said bolt for engaging said housing recesses to prevent movement of the bolt, said means being retractable by the insertion of the proper key in said key slot to permit movement'ofv said bolt by said key to locking and retracted positions, respectively.

5. A bolt lock having a cylindrical housing adapted for insertion in a corresponding recess in a frame member, a cylindrical fbolt mounted therein for rotating and sliding movement, one end of said bolt projecting from the adjacent end of said housing in flocking position'and the other being substantially flush with the corresponding end of the housing in retracted position, the latter end of the bolt being slotted to receive a key, an abutment on said bolt spaced from its locking end, a coil spring surrounding'said bolt between said abutment and the locking end of'said bolt and abutting against a fixed part of said housing, said housing`having a smooth wall free from'openings of Agreater than'45? sub# tended angle surroundingsaid springin'a'll 'positions of said bolt to avoid fouling of said spring therewith, a transverse pin in said bolt near its slotted end, a groove in said housing to receive said pin, said groove extending longitudinally and oircumferentially to permit lengthwise and turning movement of said bolt and terminating in a seat for retaining the bolt in locking position against the pressure of said spring, and radially projecting means carried by said bolt for engaging said housing to prevent rotation of the bolt, said means beingy retractable by the insertion of the proper key in said key slot to permit rotation of said bolt by said key to unseat said pin from its seat.

6. A cylindrical shell for a sliding and rotating locking bolt carrying locking tumblers, said shell having an internal flange at one end and open at the opposite end to receive the bolt, two pairs of diametrically opposed openings in said shell, said pairs of openings being spaced axially and circumferentially with respect to each other and eachbeing the same size and adapted to receive the locking tumblers carried by said bolt to lock it against rotation and axial movement in either of its positions, said shell having a lengthwise extending groove terminating in a circumferentially oiset portion to receive a guiding and locking pin on said bolt.

7. A bolt lock having a housing, a cylindrical bolt mounted therein for sliding and rotating movement, one end of said bolt being adapted for projection into a cooperating socket member in its locking position and the other end being grooved to receive a key, an abutment on said bolt spaced from its locking end, spring means surrounding said bolt between said abutment and a fixed part of said housing for retracting said bolt from locking position, a pin and groove connection between said bolt and housing spaced from said fixed part and removed from said spring means whereby the latter cannot overlap said groove in any position of said bolt, said groove extending longitudinally and circumferentially to permit lengthwise and turning movement of said bolt, the circumferential portion of said groove cooperating with said pin to retain the bolt in locking position against the pressure of said spring means whereby rotation of said bolt serves to engage and disengage said cooperating retaining means, and key actuated means carried by said bolt to lock it against rotation in its locking position.

8. A bolt lock comprising a cylindrical bolt mounted for sliding and rotating movement in a housing having a bore to receive it, the ends of said bore being open, a lengthwise and circumferentially extending groove in one of said members and a follower xed to the other member and engaging in said groove, said bolt having axially spaced transverse slots extending through it from side to side and a key slot extending from its butt end and intersecting said transverse slots, and said body having correspondingly shaped diametrically opposed axially and circumferentially spaced recesses in its wall to register with said transverse slots in the side of said bolt in locking and retracted positions thereof, transversely disposed means cooperating with said recesses and slots to prevent endwise movement and rotation of said bolt except when said means are rendered ineiective by the insertion of the proper key in said key slot.

9. A bolt lock having a cylindrical housing adapted for insertion in a corresponding recess in a frame member, a cylindrical bolt mounted therein for rotating and sliding movement, one end of said bolt projecting from said housing in locking position and the other being substantially flush with the corresponding end of the housing in retracted position, the latter end of the bolt being slotted to receive a key, an abutment on said bolt spaced from its locking end, a coil spring surrounding said bolt between said abutment and one end of said housing, a pin and groove connection between said bolt and the other end of said housing, said groove extending longitudinally and circumferentially in the direction away from said spring to permit lengthwise and turning movement of said bolt, the circumferential portion of said groove being removed from said spring in all positions of said bolt and cooperatingwithsaid pin to retain the bolt in locking position against the pressure of said spring whereby rotation of said bolt serves to engage and disengage said cooperating retaining means., and radially projecting means carried by said bolt for engaging said housing to prevent rotation of the bolt, said means being retractable by the insertion of the proper key in said key slot to permit rotation of said bolt by said key to unseat said pin from its seat.

10. A bolt lock comprising a cylindrical bolt mounted for sliding and rotating movement in a housing having a bore to receive it, a lengthwise and circumferentially extending groove in one of said members and a follower iixed to the other member and engaging in said groove, said bolt having axially spaced transverse slots extending through it from side to side and a key slot extending from its butt end and intersecting said transverse slots, and said body having diametrically opposed axially and circumferentially spaced recesses in its wall to register with said slots in the side of said bolt in locking and retracted positions thereof, spring pressed slides mounted in said axially spaced slots and normally projecting into one or the other of said spaced recesses, said recesses and slides cooperating to prevent endwise movement and rotation of said bolt except when rendered ineffective by the insertion of the proper key in said key slot.

HERMAN H. KISTNER. 

